U.S. patent application number 13/508720 was filed with the patent office on 2012-09-06 for method and device for stripping of wrapping material.
Invention is credited to Ola Henriksson, Jorgen Jensen, Nils Strandh.
Application Number | 20120222529 13/508720 |
Document ID | / |
Family ID | 43991834 |
Filed Date | 2012-09-06 |
United States Patent
Application |
20120222529 |
Kind Code |
A1 |
Henriksson; Ola ; et
al. |
September 6, 2012 |
METHOD AND DEVICE FOR STRIPPING OF WRAPPING MATERIAL
Abstract
The present invention relates to a method of stripping of
wrapping material comprising, for example, ends and a casing on
substantially cylindrical rolls of paper and the like, in which the
end of the wrapping material is opened by engagement by means of a
first tool from some position on the end surface for processing the
end wrapping material by cutting, slicing, sawing and/or other
processing of the end wrapping material in a direction out towards
the periphery of the end where the end connects to the casing, the
end being separated from the casing by means of the first tool or a
second tool by cutting, slicing, sawing and/or other processing
during rotation of the roll and/or displacement of the first tool
or the second tool round about the periphery of the end, and a
device for carrying the method into effect.
Inventors: |
Henriksson; Ola;
(Falkenberg, SE) ; Jensen; Jorgen; (Koinge,
SE) ; Strandh; Nils; (Gullbrandstorp, SE) |
Family ID: |
43991834 |
Appl. No.: |
13/508720 |
Filed: |
November 9, 2010 |
PCT Filed: |
November 9, 2010 |
PCT NO: |
PCT/SE2010/000272 |
371 Date: |
May 8, 2012 |
Current U.S.
Class: |
83/24 ; 83/23;
83/34; 83/554 |
Current CPC
Class: |
Y10T 83/0448 20150401;
B65B 69/00 20130101; Y10T 83/0453 20150401; Y10T 83/05 20150401;
Y10T 83/8735 20150401; B65B 69/0033 20130101; B26D 7/06
20130101 |
Class at
Publication: |
83/24 ; 83/34;
83/23; 83/554 |
International
Class: |
B26D 1/45 20060101
B26D001/45; B26D 7/18 20060101 B26D007/18; B26D 1/157 20060101
B26D001/157 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 10, 2009 |
SE |
0901434-1 |
Claims
1. A method for stripping of wrapping material, comprising ends and
a casing on substantially cylindrical rolls of paper, wherein the
end of the wrapping material is opened in that a first tool is
pivoted to a central position on the end surface for penetration of
the end wrapping material and is thereafter pivoted to a second
position for processing of the end wrapping material by cutting,
slicing, sawing and/or other processing of the end wrapping
material in a direction out towards the periphery of the end where
the end wrapping material connects to the casing of the wrapping
material, and [that] the end is separated from the casing by the
first tool or a second tool by cutting, slicing, sawing and/or
other processing with the tool in the second position during
rotation of the roll and/or displacement of the first tool or the
second tool round about the periphery of the end.
2. The method as claimed in claim 1, wherein the casing material is
opened from the one end of the roll to the other end by the first
tool or the second tool or a third tool by cutting, slicing, sawing
and/or other processing during displacement of the tool and/or the
roll substantially parallel with the longitudinal axis of the
roll.
3. The method as claimed in claim 2, wherein the casing material is
opened after separation of the one end or both ends or
simultaneously with the second end.
4. The method as claimed in claim 1, wherein the cutting, slicing,
sawing and/or processing by other means of the wrapping material
extending to and possibly out over the end of the roll and located
at the periphery of the end by the first or the second tool is
commenced when the first tool has reached up to and broken through
the wrapping material extending to and possibly out over the end of
the roll and located at the periphery of the end.
5. The method as claimed in claim 1, wherein prior to engagement in
the end by the first tool, a pressure difference is established
between the surroundings of the roll provided with wrapping
material and the interior of the roll for lifting of the wrapping
material from the roll.
6. The method as claimed in claim 1, wherein the end is lifted or
drawn out from the end surface of the roll before the first tool is
brought into engagement in and through the end wrapping
material.
7. The method as claimed in claim 1, wherein the ends are opened
separately or both simultaneously.
8. A device for carrying out the method as claimed in claim 1,
wherein a first tool is provided for pivoting to a first position
and penetration of the end wrapping material on the roll, pivoting
to a second position for displacement to the wrapping material
extending to and possibly out over the end of the roll and located
at the periphery of the end for cutting, slicing, sawing and/or
other processing of the packaging material, [that] the first tool
and/or a second tool is disposed, in its second position, to
separate the end from the casing by cutting, slicing, sawing and/or
other processing of the wrapping material in the region between the
end and the casing during rotation of the roll and/or displacement
of the tool round about the periphery of the end for separating
thereof from the casing.
9. The device as claimed in claim 8, wherein the first tool, the
second tool and/or a third tool is disposed to open the casing from
the one end of the roll to the other end of the roll by cutting,
slicing, sawing and/or other processing of the wrapping material in
the casing during displacement of the tool and/or the roll.
10. The device as claimed in claim 8, wherein the first tool is
combined with the second tool and that the combination of the first
tool and the second tool is combined with the third tool.
11. The device as claimed in claim 8, wherein the tools are
combined to form one and the same tool.
12. The device as claimed in claim 9, wherein the tool displays a
bottom plate, a cutting edge upstanding from the bottom plate and a
fixed knife or roller or wheel knife.
13. The device as claimed in claim 12, wherein the bottom plate is
configurated like a clothes iron and has a raised tip portion.
14. The device as claimed in claim 12, wherein the tool or wheel
knife is disposed at the rear portion of the bottom plate.
15. The device as claimed in claim 12, wherein the fixed knife is
disposed on the bottom and has a cutting edge which makes an acute
angle with the wrapping material in the cutting direction.
16. The device as claimed in claim 12, wherein the tool is mounted
on a pendulum arm for pivoting of the tool to a first position
against the end for engagement in and penetration of the wrapping
material in the end and pivoting of the tool to a second position
and displacement of the tool along the end for cutting, slicing,
sawing and/or other processing of the wrapping material in the
end.
17. The device as claimed in claim 16, wherein the tool is
displaceable by the pendulum arm along the roll from its one end to
its other end during the opening of the casing by cutting, slicing,
sawing and/or other processing of the wrapping material in the
casing.
18. The device as claimed in claim 15, wherein the cutting edge is
curved in configuration and is spiculated towards the direction of
movement.
19. The method as claimed in claim 2, wherein the cutting, slicing,
sawing and/or processing by other means of the wrapping material
extending to and possibly out over the end of the roll and located
at the periphery of the end by the first or the second tool is
commenced when the first tool has reached up to and broken through
the wrapping material extending to and possibly out over the end of
the roll and located at the periphery of the end.
20. The method as claimed in claim 3, wherein the cutting, slicing,
sawing and/or processing by other means of the wrapping material
extending to and possibly out over the end of the roll and located
at the periphery of the end by the first or the second tool is
commenced when the first tool has reached up to and broken through
the wrapping material extending to and possibly out over the end of
the roll and located at the periphery of the end.
Description
[0001] The present invention relates to a method according to the
preamble to appended claim 1 and a device for carrying the method
into effect.
[0002] Hitherto, the stripping of wrapped rolls has taken place
manually using knives, saws, splitters or the like ever since paper
or similar products began to be delivered in the form of rolls. In
such instance, it is important to find the end surface of the roll
at the transition between the casing of the wrapping and the end
wall of the wrapping, carefully using a cutting tool and thereafter
pass in the tool between the end wall of the wrapping and the end
surface of the roll, whereafter the roll is rotated about its
longitudinal axis while the cutting tool is held stationary,
oscillated like a saw or is moved around the periphery of the end
wall possibly during simultaneous rotation of the roll about its
longitudinal axis, so that the end wall of the wrapping may be
stripped off. For stripping off the casing of the wrapping
material, the cutting tool is moved between the casing and the
paper on the roll in its longitudinal direction, whereafter the
casing is removed by rotation of the roll about its longitudinal
axis. In attempts to strip off wrapping material by machine, the
manual stripping off technique has been more or less copied, but
prior art devices or machines have proved to be unreliable and
difficult to operate satisfactorily. Further, prior art devices
have resulted in considerable scrapping of damaged paper rolls,
since even the most insignificant damage may result in web breakage
and disruption in the subsequent machine process. The difficulties
inherent in stripping of wrapping material by machine are largely
attributable to suppliers using different types of wrapping
material, the rolls being stored on their ends with different
loadings which compress the wrapping material in different ways,
etc. These variations in the wrapping material make it extremely
difficult to strip off the wrapping material by machine or even
automate the stripping process, since considerable care is required
so that the end surface of the roll is not damaged. As was
mentioned above, even the most insignificant damage may lead to web
breakage and other disruptions in the subsequent process, which
would entail scrapping of damaged rolls with considerable
consequential costs for the user.
[0003] The task forming the basis of the present invention is to
realise a method of the type disclosed by way of introduction and a
device for carrying the method into effect.
[0004] This task is solved according to the present invention in
that the method disclosed by way of introduction has been given the
characterising features as set forth in appended Claim 1 and in
that the device for carrying the method into effect has been given
the characterising features as set forth in appended Claim 8.
[0005] The present invention makes for the realisation of a
machine-stripping of the wrapping material on paper rolls without
any major risk of the occurrence of damage to the end surfaces of
the paper rolls. The machine-stripping of wrapping material
according to the present invention may further very well be
automated such that the stripping of wrapping material may be
carried out without human resources inputs.
[0006] The present invention will be described in greater detail
hereinbelow, with reference to the accompanying Drawings.
[0007] FIG. 1 is a perspective view of a part of a device according
to one embodiment of the present invention, the part being shown in
a starting position.
[0008] FIG. 2 is a perspective view of the part according to FIG. 1
in another position.
[0009] FIG. 3 is a perspective view of the part in a further
position.
[0010] FIG. 4 is a perspective view of the part in yet a further
position.
[0011] FIG. 5 is a side elevation of parts in a device according to
one embodiment of the present invention.
[0012] FIG. 6 is a photographic representation of parts of a device
according to another embodiment of the present invention.
[0013] FIG. 7 shows a similar view to that of FIG. 6 with the parts
in a different position.
[0014] FIG. 8 shows a view similar to that of FIGS. 6 and 7 with
the parts in a different position than in FIGS. 6 and 7.
[0015] One embodiment of the method according to the present
invention will be described in greater detail hereinbelow in
connection with the stripping of wrapping material from a roll of
paper or similar rollable material. A wrapped roll 1 is shown in
FIG. 1 and rests on two cylinders 2 and 3 which may be free-going
or driven. It is also possible to have the one cylinder 2
free-going and the other driven. The wrapping material comprises a
casing 4 and two ends 5 of which only the one is shown in the
Drawing figures.
[0016] The stripping of the wrapping material is initiated in that
a tool 6 is displaced by a pendulum arm (not shown) into engagement
with the wrapping material in the end 5. The tool 6 has a bottom
plate 7 and a cutting edge 8 projecting up from the plate 7, the
rear portion of the edge being formed as a mounting portion for
mounting the tool on the pendulum arm (not shown), the arm being
disposed to pivot the tool 6 reciprocally to and from the end 5.
The cutting edge 8 is further of J-shaped configuration bent
towards the tip on the bottom plate 7. The bottom plate 7 is
further provided with a wheel- or roller knife 9. It is appropriate
if the pendulum arm is guided so that the tool 6 is pivoted towards
the end 5 in accordance with the arrow P in FIG. 1 for engagement
therein in a position where the roll located in the wrapping
material 4 and 5 has its centre with a cardboard sleeve and
possibly a plug. Engagement and penetration of the wrapping
material in the end 5 in this position is the least risky, since
the tool in this position runs no risk of coming into contact with
the end surface of the paper proper on the roll in the packaging
material. After the engagement and penetration of the wrapping
material in the end 5, the tool 6 is pivoted by means of the
pendulum arm until such time as the bottom plate 7 is substantially
parallel with the paper end surface on the roll, as shown in FIG.
2, and is thereafter displaced in the direction of the arrow P via
the position illustrated in FIG. 3 out towards the periphery of the
end 5 while cutting up the wrapping material in the end 5 under the
formation of the flaps F. The bottom plate 7 is planar and slightly
bent upwards towards the tip in order for it to be located a
distance from the end surface of the paper roll. The bottom plate 7
is also tipped like a ploughshare. The tool 6 may be displaced
continually or stepwise reciprocally until it arrives at the
position illustrated in FIG. 4 with the wrapping material in the
end 5 cut up from the centre out to the periphery of the end 5
where the wrapping material in the casing 4 meets the wrapping
material in the end 5. In FIG. 4 may be discerned the paper end
surface on the roll 10 with its cardboard sleeve 11. In the
peripheral position, the wheel or roller knife 9 is located with
its centre substantially flush with the casing 4. This position is
not an exact position, since it is possible to displace the tool 6
up and down (in a manner similar to a sewing machine needle) during
cutting of the wrapping material in the end 5 from the wrapping
material in the casing 4. In this cutting operation, the wrapped
roll is rotated clockwise in a direction indicated by the arrow P
on the cylinders 2 and 3. It is also possible to rotate the tool 6
around the periphery of the end 5 with or without rotation of the
wrapped roll. After cutting of the end 5 along the periphery, this
is removed for recycling of the wrapping material.
[0017] In the event that the casing 4 is to be opened immediately
after opening of the end 5, the tool 6 is switched with the tip on
the bottom plate 7 towards the wrapping material edge formed after
the cutting operation at the casing 4 for engagement between the
edge and the paper on the roll 10 and the casing 4 is displaced
from the illustrated end 5 to the opposing end (not shown) during
cutting of the wrapping material in the casing 4.
[0018] The opposing end in relation to the illustrated end 5 is cut
off by means of a tool 6 in the same manner which was described
above simultaneously with the end 5. In such an event, the
stripping of wrapping material is complete after the cutting of the
casing 4 in accordance with the preceding paragraph. The wrapping
material from the end and the casing 4 is taken care of for
recycling.
[0019] In another embodiment, the cylinders 2 and 3 are disposed on
a platform for rotation of the wrapped roll half a revolution for
positioning of the opposite end in relation to the end 5
illustrated in FIGS. 1-3 in the position illustrated in FIGS. 1-3
and cutting off in compliance with the foregoing. There may also be
provided a device with a pendulum arm and tool 6 at both ends for
simultaneous cutting of both of the ends.
[0020] In a further embodiment, cutting off of the first end 5
takes place, whereafter cutting of the casing 4 is commenced
substantially simultaneously with the cutting off of the opposite
end so that this opposite end and the casing 4 will be finished
substantially simultaneously.
[0021] The roller or wheel knife 9 may be a fixed knife with a
cutting edge which makes an acute angle with the casing 4 in the
cutting direction so that the wrapping material in the casing 4 is
urged against the cutting edge during rotation of the roll against
the tool 6.
[0022] It may also be possible to delay opening of the casing 4 to
a later opportunity in those cases where it is desirable to utilise
the casing 4 as a form of protection during displacement of the
paper roll.
[0023] In order to facilitate the engagement in the wrapping
material of the end 5, it is appropriate to realise a lifting of
the material from the end surface of the paper roll by establishing
a pressure difference between the interior and exterior of the
wrapping material using, for example, compressed air. It is also
possible to pull or lift the ends out from the end surface of the
paper roll by means of one or more suction cups, as illustrated in
FIG. 5, where they are also used for positioning of the device with
its tool 6 on the end. The suction cup or suction cups may also be
used for dealing with the cut-off end.
[0024] FIG. 5 shows parts of a prototype of a device according to
the present invention which is located at the one end 5 of a
wrapped paper magazine roll 10 with a sleeve 11. The paper roll 10
rests on cylinders (not shown). The device in FIG. 4 is built up on
a carriage 13 for moving the device to and from the end 5. The tool
6 is mounted on a pendulum arm 14 and is shown in two different
positions, in the one of which positions the tool 6 is set at an
angle to the end surface of the paper roll 10 before engagement in
the centre of the roll 10, and thereafter switching to the second
illustrated position in which the tool 6 is parallel with the end
surface of the paper roll 10 for cutting up of the wrapping
material in the end 5. The pendulum arm 14 is mounted on a plate 15
which may be displaced along the end 5. On the plate 15, there are
disposed arms 16 and 7 for supporting suction cups 18. The device
is suitably provided with four arms each with a suction cup. A
piston and cylinder assembly 19 is provided for switching of the
pendulum arm 14.
[0025] FIGS. 6, 7 and 8 show yet a further prototype of a device
according to the present invention, which is in the form of a leg
20 which is vertically displaceable up and down and horizontally to
and from the end 5 of the roll 1. At the foot end of the leg 20,
the tool 6 is mounted and, in this prototype, is substantially
triangular with a slightly projecting tip 21 and acute edges 22
which extend from the tip 21 to the base 23. The tool 6 is mounted
on the foot end of the leg 20 in order to be pivotal between a
vertical position substantially parallel with the end 5 and an
angle of approx. 45.degree. which is exemplified in FIG. 6 to the
end 5. This angle may be adapted to suit different conditions and
may be selected to be anything between the limits of 0 and
90.degree..
[0026] With this prototype, the stripping of wrapping material
commences with the tool 6 being located in its vertical position
substantially parallel with the end 5 and with the leg 20 being
lowered of displaced to a position inside the periphery of the roll
1 in order, in this position, to be displaced into abutment against
the end 5 for determining the position of the end 5. Possibly, the
diameter of the roll 1 has been determined previously or is
determined simultaneously with the position of the end. The leg 20
with the tool 6 is displace horizontally at least so far from the
surface of the end that the tool 6 may be pivoted or switched to
the position illustrated in FIG. 6 at an angle of approx.
45.degree. to the surface of the end, whereupon the tip 21 of the
tool 6 should be located substantially in the centre of the roll 1
or the surface of the end. The position of the tip 21 may be
adjusted by raising or lowering the leg 20.
[0027] From this position, the tip 21 of the tool 6 is displaced in
the 45.degree. direction to and through the material of the end.
After penetration of the material of the end, the 45.degree.
displacement ceases while holding the tip 21 under the material of
the end, whereafter the tool 6 is pivoted to the vertical position
which is illustrated in FIG. 7 in that the leg 20 is displaced
towards the end 5 and possibly under a certain lowering of the tool
6 for maintaining the tip 21 in the desired position under the
material of the end. In this position, the tip 21 is not to be in
contact with or touching the sleeve 11 of the roll 1 or possibly a
plug disposed therein. Any contact or touching between the sleeve
11 or plug of the roll 1 could prevent continued displacement or
switching of the tool 6 or even cause serious damage to the sleeve
11 or the plug.
[0028] From this position according to FIG. 7, the tool 6 is lifted
or displaced upwards or outwards towards the periphery of the roll
1 to the position illustrated in FIG. 8 during cutting of the
wrapping material of the end. Before this lifting or displacement
of the tool 6, it may be appropriate to move the tool 6 slightly
away from the end surface of the roll 1 proper in order to avoid
risk of damage thereto.
[0029] With the tool 6 in the position illustrated in FIG. 8, the
roll 1 is rotated at least one revolution for cutting off the
wrapping material of the end against the edge 22 on the tool 6 from
the casing wrapping material so that the end wrapping material may
be removed.
[0030] With a leg 20 and a tool 6 at the other end 5 of the roll 1,
the other end wrapping material may be removed, or the roll 1 may
be rotated half a revolution for further processing. The casing 4
may be removed immediately after the ends 5, or it may be removed
later.
[0031] Many modifications of the above described embodiments of the
device and method according to the present invention are naturally
possible without departing from the scope of the inventive concept
as defined in the appended Claims.
* * * * *